As to daylight savings time, I don’t know the current status, but when I was growing up, it caused problems every summer for people who lived on one side of the border and worked on the other. They also had to be careful of radio time checks, unless they listened to CKLW, whose jocks, in those big “ballsy” voices intoned “5 o’clock in Detroit, 6 o’clock at THE BIG 8…..)

A Wikipedia article describes the history of DST in MI from 1967 to 1973. No mention of pre-1967. MI observed DST in 1967 and 1968. They did not observe DST from 1969 through 1972. It resumed in 1973 and has continued ever since. This was cool, because if you had a good TV antenna, and two favourite TV shows were airing at the same time, you could watch both shows. You could watch one show on a Toledo channel – OH observed DST with ON – and then watch the ‘simultaneous’ show 1h later on a Detroit channel. Or if it was a good show, watch it twice in a row. This was an early version of time shifting that pre-dated cable and satellite!

Over the years there were various reasons to switch to daylight savings time or not. Farmers had longer days of light to work their crops. Wartime factories could get more production. On the other hand kids could be waiting in the dark for morning school buses., etc. One of the more convincing reasons to stay on standard time, offered in Michigan, is that the state is so far west in the eastern time zone that it borders on the central time zone. The natural span of sunlight for Michiganers is closer to that in Chicago than to in New York City which is on eastern time. But there were some local benefits. In the early 70s when Detroit and Windsor were last on different time standards, late night revellers would set out for another hour of partying in the Motor City after the bars closed in Windsor.